Define the role before the supplier
Be clear on the location, work pattern, must-have skills, employment type, salary parameters and hiring timeline. Agencies can give more useful responses when they are answering the same brief.
Look for relevant experience
Ask about comparable work, sector understanding and the recruiter who would manage your search. A broad company claim is less useful than a specific explanation of how they would approach your role.
Compare the approach as well as the fee
Discuss sourcing, screening, updates, shortlisting and your own hiring responsibilities. Check the fee basis, exclusivity, replacement terms and payment requirements together.
Agree communication and decisions
Nominate the hiring manager, agree feedback turnaround and decide what information you need at each stage. A good process depends on both the employer and the agency participating.